Viscosity Models and Effects of Dissolved CO2
Viscosity Models and Effects of Dissolved CO2
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DOI：
10.1021/ef3006228
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发表时间：
2012-07
期刊：
影响因子：
5.3
通讯作者：
A. Islam;E. Carlson
中科院分区：
文献类型：
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作者：
A. Islam;E. Carlson
对压力和温度范围分别为 1-600 bar 和 20-105 °C 的 CO2 地质封存的粘度模型进行了全面研究。对于液相，我们提出了纯水 (H2O)、盐水 (H2O + NaCl)、H2O + CO2、H2O + NaCl + CO2 和典型海水成分的粘度模型。在每种情况下，我们都尝试开发非常准确的公式，其参数比现有模型更少。由于它们的形式更简单，它们也有助于获得一些计算加速。溶解二氧化碳的影响得到了广泛的研究。对于液相粘度计算，我们发现，如果忽略 CO2 的存在，当溶液 CO2 饱和时，偏差甚至可达 38%，而当 CO2 溶解量为 2%（按重量计）时，偏差为 0.6-8%。
A comprehensive study is carried out on viscosity modeling for the geologic sequestration of CO2 in the pressure and temperature range of 1–600 bar and 20–105 °C, respectively. For the liquid phase, we present viscosity models for pure water (H2O), brine (H2O + NaCl), H2O + CO2, H2O + NaCl + CO2, and typical seawater compositions. In each case, we attempted to develop very accurate formulations having fewer parameters than existing models. Because of their simpler forms these also help obtain some computational speedup. The effects of dissolved CO2 are studied extensively. For liquid phase viscosity calculations we have found that, if the presence of CO2 is neglected, deviations can be even 38% when the solution is CO2 saturated and, with 2% (by weight) CO2 dissolution, the difference is 0.6–8%.